Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
SHIELD FROM LIGHTNING
Building a country house, we try to protect it from the damaging effects of fire: use heat-resistant materials, buy fire extinguishers, installed fire alarm. But the protection from...
CANS COLD
Usually composed of epoxy adhesive is considered to be usable for 2-3 hours, as at normal room temperature it solidifies soon. If you need for some reason to extend shelf-life, take the...
